// добавление запчасти в инвойс ==============================
 private void AddNewOffering()
 {
     SpareInInvoiceSelectView2 v = new SpareInInvoiceSelectView2();
     v._InvoiceID = Item.id;
     v.CurrentCurrencyCode = "BYR";
     v.ShowDialog();
     LoadOfferings();
 }
        // добавление запчасти в инвойс ==============================
        private void AddNewOffering()
        {
            SpareInInvoiceSelectView2 v = new SpareInInvoiceSelectView2();

            v._InvoiceID          = Item.id;
            v.CurrentCurrencyCode = "BYR";
            v.ShowDialog();
            LoadOfferings();
        }